Kitchen stove ventilator



May 22, 1956 w. A. PLEDGER KITCHEN STOVE VENTILATOR 2 Sheets-Sheet 1Filed Jan. 21, 1952 INVENTOR. Vl/lLL/AM A. PLEDGER BY flbxwrwlw ATTORNEYMay 22, 1956 w. A. PLEDGER KITCHEN STOVE VENTILATOR 2 Sheets-Sheet 2Filed Jan. 21, 1952 4 o o o la 4 5\ 4 7 o 4 INVENTOR. WILL/AM A.IDLEDGER BY fife/#74140 606% ATTORNEY United States Patent KITCHEN STOVEVENTILATOR William A. Pledger, San Francisco, Calif., assignor to S. E.Pledger, doing business as The Pledger Vcntiiator (30., San Francisco,Calif.

Application January 21, 1952, Serial No. 267,434 6 Claims. (Cl.126-.-301) This invention relates to a kitchen stove ventilator.

The, object of this invention is to provide a kitchen stove ventilatoreliminatingkitchen odors, hot air and product of combustion generated bythe stove.

Another object of this invention is to provide means condensing grease,oil and evaporations from the air drawn through said ventilator and todischarge into the atmosphere odorless clean air.

Another object of this invention is to provide a ventilating device ofthe type described having down draft ducts for drawing the air above theventilator into the letter- Another object of this invention is toprovide means in said ventilator located in a close vicinity to thecooking surface of a stove for drawing hot air and evaporations into theventilator.

Another object of this invention is to'provide means for collectingevaporations and oil condensed from the air passing through saidventilator.

Qther objects and advantages will appear -as the application proceedsand the novel features of the device will e part cula y pointe u n t c mre an In this specification and the annexed drawing, the invention isillustrated in the form considered to be the best but it is understood,that the invention is not limited to such form; and it is also to beunderstoodthat in and by the claims following the description, it isdesired to cover the invention in whatsoever form it may be emodied- Myinvention is'illustrated in the n s in hi Fig. l is a perspective viewof the ventilating device.

Fig, 2 is a horizontal cross section through the. same taken a o t e i2% of r lfii'g. 3 is a vertical central cross section of the, device,and t Fig. 4 is a partial front view of the device, some parts beingshown in section.

In general the kitchen stove ventilator comprising the accompanyingdrawsubject matter of this invention consists of a box-like structureextending the length of a stove. The ventilator is supported back of thestove so that it separates the stove from the wall against which it isusually placed. The ventilator also extends upwardly above the stove.and for wardly to form a spout through which the hot air, fumes andgases generated by the cooking surface of the stove are admitted into.the ventilator.

The ventilator is equipped with a plurality of filters located directlyin the path of said hot air and gases. The

filters condense oil, grease and evaporations from. the air passing.through the same and pass clean odorless air into a smoke stackconnected with said ventilator. Means for creating forced draft isarranged in said smoke stack which draws hot air, gases and products ofcombustion from said stove through said filters and smoke stack and intothe. atmosphere. A concealed fine is provided in the front part of saidventilator extending from the stove toward said filters for the purposeof passing products of 2,746,449 P ented May 2.2, 19

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combustion from the oven combustion chamber. The front wall of said fiuehas a plurality of small openings located slightly above the cookingsurface. Suction created by said forced draft draws a portion of thefumes and hot air generated by said cooking surface into said concealedflue and also products of combustion from said oven combustion chamber.The filters condensing evaporations, oil and grease from the air passingthere through are located over a trough extending the length oftheventilator into which trough condensed grease, oil and evaporationsgravitate and then flow along said trough into a container located ateach end of the same.

The ventilator has also down draft ducts for drawing in air from abovethe ventilator and lowering the telnperature of the kitchen byexhausting hot air through the ventilator. The ventilatoris alsoequipped with auto-. matic safety valves, which open when the forcedraft unit is inoperative to permit escaping gas and hot air to passinto the flue. Said valves automatically close when the forced draftunit is in operation. i

In detail the kitchen stove ventilator is generally indicated in thedrawings at 1 and is shown in combination with a gas cooking stove 2having a cooking surface 3,

an oven 4 with an oven burner chamber 6, and a stove flue 7 throughwhich fumes and products of combustion from the chamber 6 are dischargedupwardly.

The ventilator 1 is preferably made out of sheet metal and comprises afilter chamber 8, located above the gas stove 2, and formed by a top. 16and upper portions of the sides 11 and the back 12 of the ventilator.The front wall 14 is provided with an opening extending all the lengthof the chamber 8 which opening is closed by re-. movable panels 17.

The chamber 8 contains a plurality of filters 18 which are arranged sideby side at an angle to the top It] and which divide said chamber into afront compartment 19, and a rear compartment 2%. The filters 18 may beof any construction and are intended to condense oil, grease andevaporations from the air passing therethrough. a

The filters 18 rest on an angle iron 22 and a shoulder 23 of a'wall 24of a grease trough 25, and their upper ends are retained in a bracket 27integral with the top it The filters 18. may be conveniently inspectedwhen the panels 17 are removed. Oil grease and evaporations condensed bysaid filters from the air passing therethrough gradually flow into thetrough .25.. The latteris slightly inclined from the middle toward thesides 11 and at each end and below the same there is a removable con-.tainer 29 in which said oil, grease and evaporations are collected.

The top 10 of the chamber 3 is PIOVided with a smoke stack 30 which is.located in the middle thereof and which communicates with the rearcompartment 29. A forced draft unit 31 is provided on said smoke stack,which unit consists of a motor 32 and a fan 33 which force airout ofsaid rear compartment.

The lower front portion of the filter chamber 8 is pro.- vided with ahcod'35 which extends forwardly therefrom over the kitchen stove andforms a shelf for kitchen utensils. The bottom of the hood 35 is open asshown at 36. through which opening the, filters 18 are taken out of theventilator. The opening 36 provides a direct passage for hot air andevaporations produced by the cooking surface 3 into the frontcompartment 19. Below said hood 35 and in'the front of said ventilatoris arranged a concealed flue 39 which extends all the length of saidventilator- Th u is open Q t e bott m a d h s i s upper n r st te y a ros par it n 1 extending f om the front wall 42 to the grease trough wall24, said partition having a number of openings 43 therein. The line 39is intended to provide a passage for excessive heat and products ofcombustion of the oven burner chamber Gand for this-purposeit isdirectly connected with the stove flue; The-front wall- 42 of saidconcealed flue has a plurality of openings 45 located in close proximityto the cooking surface 3,,through which a portion of the hot air-andfumes generated by the latter is vented into saidflue. I

The ventilator also hasmeans for drawing hot air above theventilatorinto the latter, said means comprising two' down draft ducts46 each located at one end of said ventilator and extending from the topdownwardly a certain distance and terminating in said rear compartmentabove the lower ends of the filters 18.

'The draft created by the unit 31 is sufficient to draw some air fromabove said ventilator into the latter, thus lowering the temperature ofthe air in the kitchen.

The ventilator 1 also is provided with an insulation chamber 47,which isformed by the back wall 12 and the sides 11 of the ventilator, the frontwall 48, the top 49 and the bottom 50 of the compartment 47. The latter'compartment extends substantially from the lower ends of the filters 18downwardly below the cookingsurface 3 and serves as an insulationbetween said stove and the wall 51 which the ventilator abuts. In orderto eliminate any possibility of overheating the wall 51, the back wall12 is provided with vertical channels 53 which act as spacers betweenthetwall 51 and the body of the ventilator.

The ventilator is preferably supported on a plurality of legs 54attached to the lower ends of the sides 11 and at other convenientplaces.

In order to discharge excessive heat and gases from the stove while theforced draft unit 31 is inoperative, a plurality of automatic by-passvalves 57 is provided at each end of the ventilator. Said valves arearranged in the vertical wall 58 which connect the upper bracket 27 withthe wall 24 of the grease trough 25 and separate the compartments l9 and20 at each end of said ventilator. Said valves 57 may be of any suitabledesign and'are shown to have a counterbalance 59 which keeps the valveopen when the forced draft unit is inoperative. Suction created by theforced draft closes the valves 57 and forces the air, gasesandevaporations to pass from said cooking surface 3 and from the ovenburner chamber 6 into said front compartment 19, then through saidfilters 18 into the smoke stack and into the atmosphere. By forcing theair to pass through said filters, grease, oil and evaporations arecondensed therefrom and clean air is discharged through the stack intothe atmosphere.

The suction created by the forced draft unit 31 is sufficient to .drawsome air from the space above said ventilator, thus reducing thetemperature of the air in the kitchen;

I claim:

l. A ventilator for installation above a kitchen stove and its dischargevent comprising a box-like structure, the upper part of said structureforming a filter chamber, an air filter in said chamber for condensinggrease, oil and evaporations from the air passing therethrough, saidfilter dividing said chamber into front and rear compartments; aconcealed flue in the ventilator forming a continuous passage from thelower part thereof to the front compartment for passing products ofcombustion directly from said vent to the front compartment; a downdraft duct extending from the top of said ventilator and terminating inthe rear compartment; and means mounted on the ventilator and includinga forced draft unit and a stack communicating with said rear compartmentfor creating forced draft in said device for drawing products ofcombustion through said concealed flue and hot air rising from saidstove into said front compartment through said filter and into said rearcompartment, and for drawing hot air from above said ventilator throughsaid down draftduct into said rear compartment and for expelling theairand products of combustion frorn said rear compartment;

2. A ventilator for installation above a kitchen stove and its dischargevent comprising a box-like structure forming a filter chamber in theupper part thereof, a forwardly extending hood to catch hot air risingfrom the stove and adjoining said chamber and communicating therewith, aconcealed fine in the ventilator forming a continuous passage from saidfilter chamber to the lower part of the ventilator to receive combustionproducts from said discharge vent; an insulation chamher in theventilator and enclosed on all sides to provide a dead air cell anddisposed immediately behind the conceaied flue and extending below thesame; a down draft duct extending from the top; of said ventilatordownwardly and terminating within said filter chamber on the dischargeside thereof; a filter in said filter chamber for condensing grease, oiland evaporations from the air passing therethrough, a forced draft unitincluding a stack mounted on the ventilator above the filter chamher andcommunicating therewith for drawing into the ventilator and through saidfilter hot air, evaporations and products of, combustion and forexpelling the filtered air and gases from said ventilator.

3. ,A ventilator for installation above a kitchen stove comprising abox-like structure forming a filter chamber in the upper part thereof; aplurality of filters arranged side by side and dividingsaid chamber intoa front compartment and a rear compartment; said structure forming ahood extending forwardly from the lower portion of'the frontcompartment, said hood being open on the bottom side thereof; saidstructure forming a concealed flue in the front part thereof'below saidhood, said flue being open at the bottom and having its topcommunicating with said front compartment; a partition arranged acrossthe upper part of said flue, said partition having means therein forpermitting restricted flow of air therethrough; a downdraft ductextending from the top of the ventilator downwardly and terminating inthe rear compartment for drawing air from above said ventilator intosaid compartment; a forced draft unit mounted on valve between saidfront and rear compartments, said valve being closed when the forceddraft unit is in operation. 1 V

4. The combination of a cooking stove having a cooking surface, an ovencombustion chamber and a flue leading therefrom to the top of saidstove, with a ventilator comprising means forming afilter chamber; aplurality of air filters arranged in said chamber for condensing oil,grease and evaporations from the air passing therethrough, said filtersdividing said chamber into a front compartment and a rear compartment;means forming a downdraft duct extending from the top of said ventilatordownwardly and terminating within said rear compartment; a hoodextending above and over the cooking stove, said hood being open on thebottom and communicating with the front compartment; means including afront wall forming a concealed flue extending from the cooking surfaceupwardly and communicating with the front compartment for passingproducts of combustion from the oven combustion chamber, said front wallhaving a plurality of openings in close proximity to the cooking surfacefor passing hot air and evaporations emanating from the cooking surfaceinto said concealed flue; a cross-partition in the upper portion of saidflue, said cross partition having a plurality of openings therein forpermitting restricted flow of air therethrough; and means including asuction fan and a stack mounted on the ventilator .and communicatingwith said rear compartment for drawing hot air and products ofcombustion fromthe cooking surface and the oven combustion chamber intosaid front compartment through said filters and into said, rearcompartment, and for drawing hot air above said ventilator through saiddowndraft flue into said rear compartment, and for drawing the air andproducts of combustion out of said rear compartment.

5. The combination of a cooking stove having a cook ing surface, an ovencombustion chamber and a flue leading therefrom to the top of saidstove, with a ventilator comprising means forming a filter chamber; aplurality of air filters arranged in said chamber for condensing oil,grease and evaporations from the air passing therethrough, said filtersdividing said chamber into a front compartment and a rear compartment;means forming a downdraft duct extending from the top of said ventilatordownwardly and terminating within said rear compartment; a hoodextending above and over the cooking stove, said hood being open on thebottom and communicating with the front compartment; means including afront wall forming a concealed flue extending from 'the cooking surfaceupwardly and communicating with the front compartment for passingproducts of combustion from the oven combustion chamber, said front wallhaving a plurality of openings in closeproximity to the cooking surfacefor passing hot air and evaporations emanating from the cooking surfaceinto said concealed fiue; a cross-partition in the upper portion of saidflue, said cross partition having a plurality of openings therein forpermitting restricted flow of air therethrough; and means including asuction fan and a stack mounted on the ventilator and communicating withsaid rear compartment for drawing hot air and products of combustionfrom the cooking surface and the oven combustion chamber into said frontcompartment through said filters and into said rear compartment, and fordrawing hot air above said ventilator through said downdraft duct intosaid rear compartment, and for drawing the air and products ofcombustion out of said rear compartment; and means for forming aninsulation chamber back of said concealed flue.

6. The combination of a cooking stove having a cooking surface, an ovencombustion chamber and a flue leading therefrom to the top of saidstove, with a ventilator comprising means forming a filter chamber; aplurality of air filters arranged in said chamber fortcondensing oil,grease and evaporations from the air passing therethrough, said filtersdividing said chamber into a front compartment and a rear compartment;means forming a downdraft duct extendingfrom the top of said ventilatordownwardly and terminating within said rear com-' tion chamber, saidfront wall having a plurality of openings in close proximity to thecooking surface for passing hot air and evaporations emanating from thecook ing surface into said concealed flue; a cross partition in theupperportion of said flue, said cross partition having a plurality ofopenings therein for permitting restricted fiow of air therethrough;blower means including a stack mounted on the ventilator and incommunication with said rear compartment for drawing hot air andproducts of combustion from the cooking surface and the oven combustionchamber into said front compartment through said filters and into saidrear compartment, and for drawing hot air from above said ventilatorthrough said down draft duct into said rear compartment, and for drawingthe air and products of combustion from said rear'compartment; means forforming an insulation chamber back of said concealed flue; and means forcollecting oil, grease and evaporations condensed by said filters.

References Cited in the file of this patent UNITED STATES PATENTS

